I did not see ISON naked-eye, however - partly because my observing place is pretty light polluted, partly because of some clouds hindering the observations. But a first report from Spain seems to confirm my estimation: Comet C/2012 S1 ISON is now a naked-eye object - it increased brightness from 8mag to 6mag in just two days!
This raw image I took this morning shows the bright, greenish coma. The tail does not to have brighten up, at least not in my quick assessment.
Edit: this is the processed image (16x60sec stacked). Not the very best one, I had to shoot between clouds and twilight:
This is getting exciting!